Hi Tom. This works.
<?php
global $post;
$image = get_post_meta($post->ID, 'custom_header', true);
if ( ! empty( $image ) ) : ?>
<img src="<?php echo $image; ?>" alt="" />
<?php else : ?>
<img src="URL TO MY DEFAULT LOGO" alt="" />
<?php endif; ?>
But when i scroll down on the page, the “original” Logo shows up in the sticky header. How can solve this? Need in sticky also the Logo from the Custom Fields metabox.
Thanks!!!
Timo